Dear all,
Here I have a very detailed question and I would like to thank
you all for your help in advance.
Some background information first:
Thunder is a very popular P2P file downloading software in
China and it is not open sourced. Recently I have been doing some protocol
analysis experiments about Thunder by Wireshark. Experiment descriptions are as
follows:
Experiment 1 : Close other applications and run
Thunder------I will get a lot of packets with the protocol name as OICQ. (OICQ
is a very popular IM soft ware in china but actually during this experiment I
did not open it).
Experiment 2: keeping all other setting unchanged, I close
Thunder, immediately after experiment 1---------Here I did not get any OICQ
packets anymore.
Actually I have talk to some guys who work in OICQ company
and according to them, Thunder and OICQ are competitors and there are not any
co-operations between them. So I am really confused that how I can
capture OICQ packets from Thunder while the OICQ is not running.
Therefore, if it is possible, may I ask how Wireshark works and decide a
packet is an OICQ packet? I mean, besides of the UDP port, are there any other
ways for Wireshark to categorise a packet to be an OICQ packet?
Actually I am really confused here and your help will be
really appreciated for me.
Thank you in advance and best regards,
Adele JIA